410 



Polyrhachis subpilosa, Emery, Ann. Mus. Civ. Gen, xxxiv (1894), 



p. 480, $ . 

 Polyrhachis puuctillata, Roger, race fergusoui, Forel, Ann. Soc. En1. 



Belye, xlvi (1902), p. 289, . 



$ . Black, opaque, minutely rugulose, with a very short and 

 sparse covering of pale erect hairs and a thin fine silky pubes- 

 cence. Head oval, vertex rounded, very little broader posteriorly 

 than in front ; cly peus broader than high and indistinctly medially 

 carinate ; antennal carin* moderately wide apart. Thorax broad, 

 narrowed posteriorly, laterally incised at the pro-meso- and 

 meso-metanotal sutures, the former suture distinct, the latter 

 nearly obsolete ; anterior margin of pronotum undulate, the 

 lateral angles armed with a strong triangular tooth pointing 

 outwards ; basal portion of metanotnm trapezoidal, the lateral 

 posterior angles each with a very short erect tooth, the bases 

 joined by a slight carina ; apical portion of metanotum concave ; 

 legs slender ; tibiae smooth, without spines. Node of pedicel 

 biconvex, quadridentate, the teeth or little spines equidistant one 

 from the other ; abdomen broadly oval, very convex above. 



u $ . Black, with a distinct grey sheen. Head strongly longi- 

 tudinally striate. Thorax intricately sculptured. Teeth of the 

 metanotum distinct. Xode of pedicel slightly emarginate, the 

 lower lateral teeth more acute than in the Abdomen and 

 the rest of the body as in the . Wings brownish, with brown 

 nervures ; wing about 8 mm. in length." (Roger.) 



Length, $ 5-6 ; $ 7 mm. 



Hob. North-west Provinces (Smythies) ; Kanara (Wrouyhton) ; 

 Burma, Pegu Toma ( Allan), Southern Shan States (Thompson) ; 

 Ceylon (Terbury). 



The three varieties, races or subspecies, Polyrhachis smythiesi, 

 Forel, P. subpilosa, Emery, and P. fergusoni, 'Forel, grade into 

 typical punctiV.ata, the chief difference being the length of the 

 teeth or spines on the pedicel. These are longest, so far as 

 the two middle spines are concerned, in P. fergusoni, and almost 

 obsolete in P. subpilosa. 



493. Polyrhachis thrinax, Roger, Berl. ent. Zeit. vii (1863), p. 152, : 

 Forel, Jour. Bomb. N. H. Soc. viii (1893), pp. 18 & 28, $ rf . 



$ . Brownish yellow, the abdomen translucent yellow ; head, 

 thorax and node of pedicel rugulose granulate ; legs and abdomen 

 shining, smooth ; pubescence almost entirely wanting, reduced to 



Fig. 1-43. Polyrhachis thrinax, 



a very few erect yellow hairs on the front of the head and apex 

 of the abdomen. Head oval, vertex rounded, eyes large and 



